the application shall not be allowed to proceed unless it is amended so as to exclude the additional matter.

(2) No amendment of an application for a patent shall be allowed under section 15A(6), 18(3) or 19(1) if it results in the application disclosing matter extending beyond that disclosed in the application as filed.

(3) No amendment of the specification of a patent shall be allowed under section 27(1), 73 or 75 if it -

(a) results in the specification disclosing additional matter, or

(b) extends the protection conferred by the patent.

(4) In subsection (1A) above "relevant application" has the meaning given by section 5(5) above.